Q: What is Efflorescence?
A: Efflorescence is a naturally occurring white, chalky residue that forms on the surface of concrete. Efflorescence is completely natural and occurs with all concrete products containing cement. Efflorescence is created when the calcium oxide naturally found in the cement mixes with water to form calcium hydroxide and then is leached to the surface of the paver where it comes in contact with the carbon dioxide in the air and then forms calcium carbonate which forms the white, chalky residue referred to as efflorescence.
The formation of efflorescence is NOT a sign of defective or damaged pavers.
Efflorescence will naturally disappear on its own once all of the calcium oxide in the cement is leached out, but the time that this takes varies upon your local climate conditions. The more rain that your concrete brick pavers receive; the faster the efflorescence will leach out.
Q: What is Polymeric Sand?
A: Polymeric sand is used to fill the joints between pavers, including concrete pavers, brick pavers and stone pavers. This product is a fine sand combined with additives, usually silica, that, when mixed with water, form a binding agent. These binders lock the sand particles together, which helps lock all the pavers together.
Plain old sand can be used to fill the joints between pavers, but polymeric sand offers many advantages:
Improves durability. The binding agents in this product help lock the pavers together. This will give your installation more strength over the long haul. Polymeric sand also reduces the amount of water that will wash between the pavers and down into the base materials. This will help keep the foundation of your project sturdy as well.
Prevents washouts. A heavy rain won’t wash all of the sand out of the joints between pavers if you use polymeric sand. With plain old sand, this is a common problem.
Deters weeds. Weeds are amazingly resilient and can grow almost anywhere. Using this product won’t guarantee that weeds won’t grow in your new walkway or patio, but it will help considerably. Plain sand is a much more inviting home for weeds than polymeric sand.
Resistance to ants. Ants will have a much more difficult time getting into and making homes in the spaces between your pavers if you use polymeric sand.
Colors. Polymeric sand comes in a variety of colors, usually in different shades of gray and beige. Choose the color that goes best with your pavers.
Call us for a free consultation or estimate:
Chuck Navarro 949-701-2888